1*ebfedea0SLionel Sambuc /* $NetBSD: getdtablesize.c,v 1.1.1.1 2011/04/13 18:15:41 elric Exp $ */
2*ebfedea0SLionel Sambuc
3*ebfedea0SLionel Sambuc /*
4*ebfedea0SLionel Sambuc * Copyright (c) 1995-2001 Kungliga Tekniska Högskolan
5*ebfedea0SLionel Sambuc * (Royal Institute of Technology, Stockholm, Sweden).
6*ebfedea0SLionel Sambuc * All rights reserved.
7*ebfedea0SLionel Sambuc *
8*ebfedea0SLionel Sambuc * Redistribution and use in source and binary forms, with or without
9*ebfedea0SLionel Sambuc * modification, are permitted provided that the following conditions
10*ebfedea0SLionel Sambuc * are met:
11*ebfedea0SLionel Sambuc *
12*ebfedea0SLionel Sambuc * 1. Redistributions of source code must retain the above copyright
13*ebfedea0SLionel Sambuc * notice, this list of conditions and the following disclaimer.
14*ebfedea0SLionel Sambuc *
15*ebfedea0SLionel Sambuc * 2. Redistributions in binary form must reproduce the above copyright
16*ebfedea0SLionel Sambuc * notice, this list of conditions and the following disclaimer in the
17*ebfedea0SLionel Sambuc * documentation and/or other materials provided with the distribution.
18*ebfedea0SLionel Sambuc *
19*ebfedea0SLionel Sambuc * 3. Neither the name of the Institute nor the names of its contributors
20*ebfedea0SLionel Sambuc * may be used to endorse or promote products derived from this software
21*ebfedea0SLionel Sambuc * without specific prior written permission.
22*ebfedea0SLionel Sambuc *
23*ebfedea0SLionel Sambuc * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24*ebfedea0SLionel Sambuc * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25*ebfedea0SLionel Sambuc * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26*ebfedea0SLionel Sambuc * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27*ebfedea0SLionel Sambuc * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28*ebfedea0SLionel Sambuc * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29*ebfedea0SLionel Sambuc * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30*ebfedea0SLionel Sambuc * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31*ebfedea0SLionel Sambuc * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32*ebfedea0SLionel Sambuc * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33*ebfedea0SLionel Sambuc * SUCH DAMAGE.
34*ebfedea0SLionel Sambuc */
35*ebfedea0SLionel Sambuc
36*ebfedea0SLionel Sambuc #include <config.h>
37*ebfedea0SLionel Sambuc
38*ebfedea0SLionel Sambuc #include <krb5/roken.h>
39*ebfedea0SLionel Sambuc
40*ebfedea0SLionel Sambuc #ifdef HAVE_SYS_TYPES_H
41*ebfedea0SLionel Sambuc #include <sys/types.h>
42*ebfedea0SLionel Sambuc #endif
43*ebfedea0SLionel Sambuc #ifdef TIME_WITH_SYS_TIME
44*ebfedea0SLionel Sambuc #include <sys/time.h>
45*ebfedea0SLionel Sambuc #include <time.h>
46*ebfedea0SLionel Sambuc #elif defined(HAVE_SYS_TIME_H)
47*ebfedea0SLionel Sambuc #include <sys/time.h>
48*ebfedea0SLionel Sambuc #else
49*ebfedea0SLionel Sambuc #include <time.h>
50*ebfedea0SLionel Sambuc #endif
51*ebfedea0SLionel Sambuc #ifdef HAVE_SYS_PARAM_H
52*ebfedea0SLionel Sambuc #include <sys/param.h>
53*ebfedea0SLionel Sambuc #endif
54*ebfedea0SLionel Sambuc #ifdef HAVE_UNISTD_H
55*ebfedea0SLionel Sambuc #include <unistd.h>
56*ebfedea0SLionel Sambuc #endif
57*ebfedea0SLionel Sambuc
58*ebfedea0SLionel Sambuc #ifdef HAVE_SYS_RESOURCE_H
59*ebfedea0SLionel Sambuc #include <sys/resource.h>
60*ebfedea0SLionel Sambuc #endif
61*ebfedea0SLionel Sambuc
62*ebfedea0SLionel Sambuc #ifdef HAVE_SYS_SYSCTL_H
63*ebfedea0SLionel Sambuc #include <sys/sysctl.h>
64*ebfedea0SLionel Sambuc #endif
65*ebfedea0SLionel Sambuc
66*ebfedea0SLionel Sambuc ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
getdtablesize(void)67*ebfedea0SLionel Sambuc getdtablesize(void)
68*ebfedea0SLionel Sambuc {
69*ebfedea0SLionel Sambuc int files = -1;
70*ebfedea0SLionel Sambuc #if defined(HAVE_SYSCONF) && defined(_SC_OPEN_MAX)
71*ebfedea0SLionel Sambuc files = sysconf(_SC_OPEN_MAX);
72*ebfedea0SLionel Sambuc #else /* !defined(HAVE_SYSCONF) */
73*ebfedea0SLionel Sambuc #if defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)
74*ebfedea0SLionel Sambuc struct rlimit res;
75*ebfedea0SLionel Sambuc if (getrlimit(RLIMIT_NOFILE, &res) == 0)
76*ebfedea0SLionel Sambuc files = res.rlim_cur;
77*ebfedea0SLionel Sambuc #else /* !definded(HAVE_GETRLIMIT) */
78*ebfedea0SLionel Sambuc #if defined(HAVE_SYSCTL) && defined(CTL_KERN) && defined(KERN_MAXFILES)
79*ebfedea0SLionel Sambuc int mib[2];
80*ebfedea0SLionel Sambuc size_t len;
81*ebfedea0SLionel Sambuc
82*ebfedea0SLionel Sambuc mib[0] = CTL_KERN;
83*ebfedea0SLionel Sambuc mib[1] = KERN_MAXFILES;
84*ebfedea0SLionel Sambuc len = sizeof(files);
85*ebfedea0SLionel Sambuc sysctl(&mib, 2, &files, sizeof(files), NULL, 0);
86*ebfedea0SLionel Sambuc #endif /* defined(HAVE_SYSCTL) */
87*ebfedea0SLionel Sambuc #endif /* !definded(HAVE_GETRLIMIT) */
88*ebfedea0SLionel Sambuc #endif /* !defined(HAVE_SYSCONF) */
89*ebfedea0SLionel Sambuc
90*ebfedea0SLionel Sambuc #ifdef OPEN_MAX
91*ebfedea0SLionel Sambuc if (files < 0)
92*ebfedea0SLionel Sambuc files = OPEN_MAX;
93*ebfedea0SLionel Sambuc #endif
94*ebfedea0SLionel Sambuc
95*ebfedea0SLionel Sambuc #ifdef NOFILE
96*ebfedea0SLionel Sambuc if (files < 0)
97*ebfedea0SLionel Sambuc files = NOFILE;
98*ebfedea0SLionel Sambuc #endif
99*ebfedea0SLionel Sambuc
100*ebfedea0SLionel Sambuc return files;
101*ebfedea0SLionel Sambuc }
102